mcmahan



@eine tatenl iba-tent @fitte GLABURN s. Montanari, on GENTREVILL'E,INDIANA Leners Poem No. 78,602, ma Jane e, 1868,

:inrnovnunnr In PUMPS.

To ALL WHoM 1r 'MAY' oononnN:

Be it known that :[,CLABURN S. McMAHAN, of.Centreville,vin the county ofWayne, and State of Indiana, have invented a new and useful Improvementin Pumps; and I do hereby deelarethat the following is a full and exactdescription thereof, reference being had to the accompanying drawing,making a part of this speciiieation, in which- Figure 1 is a perspectiveview, and

Figure 2 a longitudinal section.

The same lettersin the diier'ent figuresrelate to corresponding partsofthe invention.

My invention is designed to obviate the liability'of water'to freeze inpumps, and thus render thelatt'er inoperative, as withpumps of ordinaryconstruction, during weather suiiiciently cold.` Another feature in myinvention relates to the manner of constructing the piston ofthe pump,byvwhich greater durability is obtained.

To enable others skilled in thev art to make and use my invention, Iwill proceed'to describe its construc-A tion and operation. l i i Thelower valve, c, is operated by the rod which latter has its upper end,t, situated at a convenient height for operating, and extends down' thepump-stock to near the bottom, and below the water-Aline, where itenters the pump through aperture e, and is then extended ,up theinterior ofthe pump, with-the end terminating incontact with valve c.The end, la, is brought to an acute angle, giving it morebearing-surface, and adapting it to the position of the valve when'raised, and thus preventing the rod from being forced to one side. Theaperture e is suiiciently large to` admit oi' the necessary verticalplay of the rod in operating the valve. An elongated loop is formed inthe rod at g, which operates on a screw` partially inserted, or otherlike projection, having a head to retain the loop, allows the rodsufficient vertical play, and serves to keep it in positionpagainslt thepump.

An iron strap, n, screwed or otherwise secured to the pump-stock, underwhich the rod slides, when operated, also serves to keep the latter inposition. I

The valve ol on piston P has attached to it the chain,'b, which extendsthrough the pump-cover, and terminates in ring S. An elongated link ofsaid chain, at z', which is held against the pump-rod by means of aprojecting pin having a head to prevent said link frombeing detached,allows the chain the necessary vertical play for raising the valve, butprevents it from dangling and thus injuring the valve during theoperation of pumping. i i

The ordinary manner of constructing pump-pistons, by tacking the leathercovering on a piston ot' uniform diameter, causes a very Considerablewear of the inside of the pump in consequence'oi` therubbing ofthetacks, and thus rendering said pump liable to soon become disordered.To. obviate this objection, I propose to 'either taper the bottom of thepiston or provide it with a circumferential groove,`allowing suiiicientroom for a band, as -seen at J. The edges ofthe leather .are united bystitching, and thus no hard substance connected with said piston isbrought in contact with the pump. Avery simple and eicient band'may beformed by drawing wire around the piston and twisting the endstogethcr'to secure it.

l An aperture, 1', near the top of the pump, over which is secured thespout or funnel m, is provided for eonvenience in pouring in water tostart the pump, in case-of the water having beendet ed.

Having thus fully described my said invention, what I claim, and desireto secure by Letters Patent, is- Thepiston P, in combination with valvesC and d, when the latter areprovided with hoisting-appendages, asdescribed, and the'whole arranged and operating substantially as and forthe purpose set forth.

CLABURN S. McMAHAN.

Witnesses:

JOHN S. LYLE, J. M. BRowN.

